Select the appropriate skin model (tap the one on the right if you’re unsure) and tap Confirm to apply your changes.Tap Choose New Skin and select the file you downloaded earlier.Tap the blank skin icon in the top-left of the display.
In the latest versions of iOS and Android, the download of the image file should begin automatically.
Despite not offering the full Minecraft experience, Minecraft PE owners can get in on the custom skin fun too.